Results 251 to 260 of about 21,762 (301)
Some of the next articles are maybe not open access.
The calibration of passive microwave sensors
Advances in Space Research, 1997Abstract In order to measure the absolute brightness temperature of a scene a passive microwave radiometer must be accurately calibrated if the drifts in the instrument receiver gain are not to be misinterpreted as changes in scene brightness temperature.
A.R.L. Tatnall, M.L. Jarrett
openaire +1 more source
1976
All matter at temperatures different from absolute zero is radiating electromagnetic energy. Most natural solid and fluid media met in the terrestrial environment obey approximately to the spectral behavior of thermal radiation within limited bandwidths as it is described by the Planck radiation law for the so-called black body. At a temperature of 300
openaire +1 more source
All matter at temperatures different from absolute zero is radiating electromagnetic energy. Most natural solid and fluid media met in the terrestrial environment obey approximately to the spectral behavior of thermal radiation within limited bandwidths as it is described by the Planck radiation law for the so-called black body. At a temperature of 300
openaire +1 more source
The statistical treatment of passive microwave data
IEEE Transactions on Geoscience and Remote Sensing, 1993A statistical treatment of microwave remote sensing data of the Earth's surface is described. The statistical characteristics of radiothermal emission from such surfaces as pure water, oil spills on water, soils, and forests are analyzed, and the relationships between the statistics of the radiothermal emission and surface parameters are discussed.
openaire +1 more source
Passive microwave signatures of landscapes in winter
Meteorology and Atmospheric Physics, 1994The successful application of passive microwave sensors requires signatures for the unambiguous inversion of the remote sensing data. Due to the large number of object types and large variability of physical properties, the inversion of data from land surfaces is a delicate and often ambiguous task. The present paper is a contribution to the assessment
openaire +1 more source
Passive microwave detection of bubble wakes
IEEE International IEEE International IEEE International Geoscience and Remote Sensing Symposium, 2004. IGARSS '04. Proceedings. 2004, 2004Microwave detection of ocean (sub)surface bubble populations including patches, patterns, flows, and wakes is considered. The physical principles are based on specific electromagnetic properties of the air-bubble-water media that produce strong anomalies in ocean thermal microwave emission, especially at X- C-, S- and L- bands (e.g., at wavelengths of ...
openaire +1 more source
2009
This chapter contains sections titled: Terminations Attenuators Phase Shifters Directional Couplers Hybrid Junctions Power Dividers Microwave Propagation in Ferrites Faraday Rotation Microwave Devices Employing Faraday Rotation Circulators Other Ferrite Devices This chapter ...
openaire +1 more source
This chapter contains sections titled: Terminations Attenuators Phase Shifters Directional Couplers Hybrid Junctions Power Dividers Microwave Propagation in Ferrites Faraday Rotation Microwave Devices Employing Faraday Rotation Circulators Other Ferrite Devices This chapter ...
openaire +1 more source
Printable planar dielectric passive microwave components
2015 IEEE International Symposium on Antennas and Propagation & USNC/URSI National Radio Science Meeting, 2015Printable planar dielectric passive microwave components are investigated in this paper. Micron-size-thick films are printed on low-loss microwave substrates and considered as nearly perfect magnetic walls to realize microwave components. The permittivity contrast between the substrate and film is kept high in order to minimize the leakage power and ...
A. Rashidian +5 more
openaire +1 more source
Use of Passive Microwaves Over the Amazon Forest
[Proceedings] IGARSS '92 International Geoscience and Remote Sensing Symposium, 2005In this study, an attempt is made to derive the evolution of the water status of the Amazon forest canopy over a short period, from satellite microwave radiometry. The Nimbus-7 Scanning Multichannel Microwave Radiometer (SMMR) temperature corrected tapes data are analysed for the 6.6, 10.7, 18 and 37 GHz frequencies, at daytime and nighttime, for the ...
Calvet, J.C. +4 more
openaire +2 more sources
2009
Although the theme of this book is radar remote sensing, imaging with passive microwave is a complementary technology that warrants an introduction to identify its role alongside radar. This chapter lays the framework for passive microwave imaging, drawing in part from the scattering treatment developed for imaging radar in Chapt ...
openaire +1 more source
Although the theme of this book is radar remote sensing, imaging with passive microwave is a complementary technology that warrants an introduction to identify its role alongside radar. This chapter lays the framework for passive microwave imaging, drawing in part from the scattering treatment developed for imaging radar in Chapt ...
openaire +1 more source
Passive Microwave Sensing of the Earth
MTT-S International Microwave Symposium Digest, 2005Passive microwave radiometers have found varied geophysical applications, particularly the remote sensing from satellites of atmospheric temperature and humidity profiles, clouds, soil moisture, snow and ice type and coverage, and other parameters.
openaire +1 more source